package study.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import study.reggie.common.CustomException;
import study.reggie.common.R;
import study.reggie.dao.DishDao;
import study.reggie.dto.DishDto;
import study.reggie.pojo.Dish;
import study.reggie.pojo.DishFlavor;
import study.reggie.pojo.Setmeal;
import study.reggie.pojo.SetmealDish;
import study.reggie.service.DishFlavorService;
import study.reggie.service.DishService;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishDao, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;
    /*
    * 新增菜品，同时保存对应的口味数据
    * */
    @Transactional
    public void saveWithFlavor(DishDto dishDto){
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);

        //菜品id
        Long dishId = dishDto.getId();

        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors=flavors.stream().map((item) ->{
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);
    }

    /*
    * 根据id查询菜品信息和对应的口味信息
    * */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表查询
        Dish dish=this.getById(id);

        //拷贝
        DishDto dishDto=new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        //查询当前菜品对应的口味信息，从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);

        return dishDto;
    }

    /*
    * 修改对应口味的菜品信息
    * */
    @Override
    @Transactional
    public void updateByIdWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);

        //清除当前菜品对应口味数据——dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());

        dishFlavorService.remove(queryWrapper);

        //添加当前提交过来的口味数据——dish_flavor表的add操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        //封装菜品口味对应的菜品id
        flavors=flavors.stream().map((item) ->{
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());



        dishFlavorService.saveBatch(flavors);


    }

    @Override
    @Transactional
    public void removeWithFlavor(List<Long> ids) {
        //查询菜品状态是否可以删除
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.in(Dish::getId,ids);
        queryWrapper.eq(Dish::getStatus,1);

        int count = this.count(queryWrapper);

        if(count>0){
            //如果不能删除抛出一个异常
            throw new CustomException("勾选的菜品中含有正在售卖的菜品，请先停售再删除");
        }

        //如果可以删除，先删除套餐表中的数据
        this.removeByIds(ids);

        //查询出dish_flavor表中的关联数据
        LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper=new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(DishFlavor::getDishId,ids);
        //删除关系表中的数据--dish_flavor
        dishFlavorService.remove(lambdaQueryWrapper);
    }


}
